(19)
(11) EP 0 863 364 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.07.1999 Bulletin 1999/30

(43) Date of publication A2:
09.09.1998 Bulletin 1998/37

(21) Application number: 98200705.6

(22) Date of filing: 06.03.1998
(51) International Patent Classification (IPC)6F22B 1/18, F01D 25/30, F01K 23/10
(84) Designated Contracting States:
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 07.03.1997 IT MI970509

(71) Applicant: ABB Combustion Engineering S.p.A.
20137 Milano (IT)

(72) Inventor:
  • De Martino, Piero
    L-20126 Milano (IT)

(74) Representative: Giavarini, Francesco 
ABB Ricerca S.p.A. Viale Edison, 50
20099 Sesto San Giovanni (MI)
20099 Sesto San Giovanni (MI) (IT)

   


(54) Heat-recovery boiler provided with divergent duct


(57) A heat-recovery boiler provided with a divergent duct that runs from the outlet of a turbine to the inlet of a boiler; the covering wall of the divergent duct, which runs from the top of the boiler to the top of the outlet of the turbine, is inclined at an angle (α) which is greater than 45° and up to 75° with respect to the horizontal plane; the divergent duct is connected with the upper part of the outlet of the turbine by means of an arc-shaped wall portion; inside the divergent duct, in the region delimited by the arc- shaped wall, gas stream conveyance profiles are provided which are arranged in succession and in adjacent rows.







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